Ok ill try to explain lambda a little better. If you have your stoich set to 14.7 and put e85 in there the car will run lean until the fuel trims makes up for it. It will slowly get to 9.8 afr (lambda 1.00) not stay at 14.7. Your wideband will start saying super lean at first and slowly go to 14.7 as the actual afr goes to 9.8. Unless you have an e85 setting on your wideband.
If you go the other way and put your stoich as 9.8 because you run e85 and then put gas in it it will be very rich but slowly go to 14.7 actual. In both cases your commanded will be the stoich value in the computer but will end up with actual stoich.
You also can't change the value that the narrowband Mv is, it's a sensor. So like a temp sensor a certain voltage = a certain number whether its lambda or it's temperature. You can recalibrating the computer to tell it that 400mv is stoich and it will think that number =lambda 1.00.
And lambda isn't commanded, you can command .75-.78 or whatever lambda in PE so that it achieves a fueling of 11.0-11.5ish. Commanded lambda isn't 1 then. That's why it's better to work in terms of lambda, 1.00 is always 1.00 and .78 is always .78 no matter the fuel.
